Double-disk harrow.



G. W. WILLIS.

DOUBLE DISK HARROW.-

APPLICATION FILED MMLZG. I915.

Patented Nov. 6, 1917.

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fiifi fiefiifir George Ml (U111113- 5 I UNITED STATES PATENT curios.

GEORGE W. WILLIS, 0F AUBURN, NEW YORK, ASSIGNOB T0 INTERNATIONAL HAR- VESTER COMPANY OF NEW JERSEY, A CORPORATION OF NEWJERSEY.

DOUBLE-DISK HARROW.

Specification of Letters Patent.

Patcnted'Nov. 6, 1917.

Application filed. March 26, 1915. Serial No. 17,120.

To all whom it may concern:

citizen of the United States, residing at Auburn, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Double-Disk Harrows, of which the following is a full, clear, and exact specification.

This invention relates to double disk harrows. My object is to improve and simplify the operation and construction of such devices.

Heretofore in the construction of harrows where overlapping gangs are employed, it has been ditlieult to overcome the tendency of the machine to draw to one side. It is,

[of course, advantageous to have the gangs overlap in order to cultivate or harrow all portions of the soil, leaving no ridges as Where the gangs are not overlapping. Accordingly, I have provided a new arrangement of the gang members in a double disk harrow where the disks are made to overlap and in which all tendency of the harrow to draw to one side is eliminated.

One form which my invention may assume is exemplified in the following description and illustrated in the accompanying drawing, in which I Figure 1 shows a plan view of a harroW embodying my invention; and

Fig. 2 shows a side elevation of the same.

In the form shown herewith 'I have provided a main frame 10, constructed preferably of angle bar, and arranged in substantially A-shape. Central longitudinal frame bars 11 are also provided, these being spaced apart a slight distance, and connected at their forward ends to the apex of the main frame, and at their rear ends supported on a transverse frame bar 12 extending between the rear end. of the main frame. Arranged centrally on. this frame is a gang member 13, extending transversely thereof beyond either side of the main frame. It comprises a. gang frame 14 carrying a shaft 15, on which are mounted one-way disks, and, as shown, thereare preferably an uneven number of these disks, the middle one being arranged 1n the exact center of the main frame. A vertical pivotal member 16 is arranged centrally on the gang frame 1 1 and is carried in a bearing block 17 fitted between the spaced bars 11. Near eacheend of the gang frame isprovided a slot 18 adapted to receive a bolt or other connecting means 19 carriedby the outer sides of the main frame. A series of openings 20 in each of the outside frame bars is provided for each of these connecting means to permit adjustment of the gang 61 relative to the line of draft. Fore and aft of the centrally arranged gang just described are two disk gangs 21 and 22 of approximately one-half the length of the former, and these are arranged in offset relation extending. from the central draft line of the mam frame outwardly. The disks of these gangs have their concavities arranged to turn the soil in a direction opposite to the throw of the central gang members. Bearing blocks 23, carried also between the spacedbars 11, receivethe pivotal members 24; of these shorter gangs, and spaced openings 25 are provided in the outer sides of the main frame at diagonally opposite corners to receive the connecting means 26 for adjusting the gangs on their vertical pivots.

In practice the long centrally arranged gang is ad usted so that it extends diagonally of the main frame and, as shown, this member acts to throw the soil'in one direction. 'The shorter gangs are adjusted to cocupy oppositely directed angles from the "the front gang member will be to dip,

whereas its inner end will rise slightly:

\Vith the long central gang member the dip 100 or suction, will occur on the end opposite that of the forward gangmember, and similarly the tendency to rise from the ground will take place on the end adjacent. In the case of the rear shorter gang member the 105 rising tendency takes place on the outer end, while on its inner end the tendency is to dip. It will thus be seen that the rising and falling action of the gangs will be ne tralized and, on account of the rigid fra e 1'10 construction and relative arrangement of the gangs, considerable downward stress will be thrown upon the central longitudinal'bars 11, tending thereby to hold the inner end of the forward gang member and the central disks of the long gang member to their work, and as a result the disks which meet first ;with the soil will be prevented from risi a and, obviously,

mg out of the ground. The gangs obviously may be .adjusted to assume positions at right angles to the line of draft for the purpose of transporting the harrow, but in practice I have found it advantageous to employ transport trucks so that the angles of the gangs may be left undisturbed after once being set. 7

It is obvious that I have obtaind the maximum simplicity in the construction and des'gn ofthis harrow, and, as will be seen, all parts of the soil over which it passes will be thoroughly disked and no uncultivated ridges will be left asin the case of double disk harrows employing the cruciform arrangement of the gang. The fore and aft gang members employ the same number of disks as are carried on each side of the central disk of the long gang niernber. The cutting angles of all the disks are the same, the barrows will balance The cenperfectl with respect to draft.

tral dis of the long gang member, it will be seen, is equally disposed on each side of the central draft line, thereby having no tendency to pull one way or the other.

\Vhile I have shown and described but one form and arrangementof my liarrow, it is understood, nevertheless, that it is capable of other'modifications; Therefore, varying forms may be resorted tonvithout. departing from the spirit of my invention, as disclosed in the appended claims.-

What I claim as my invention, and desire to secure by Letters Patent,.is: A

1. In a harrow, a centrally arranged meinher, and three diagonally arranged! disk gangs having an overlapping relationship and pivotally' connected thereto, two of said gangsbein offset. 1 v 2. ha. ouble disk harrow, a frame a central disk gang, and fore and after olfket disk gangs of shorter lengthsg'allof said gangs being associated with said plane.

3. .Ina double disk harrow, "a frame, disks carried centrally thereon for throwing the disks carried in soil .in one direction, and offset relation fore and aft of said central disks for turning the soi-l in an with said frame.

4. In a double disk harrow, centrally, angularly arranged disk gang, and shorter angularly arranged disk gangs carried fore and aft parallel relation.

In a double disk barrow, transversely arranged disk gang mounted centrally thereon and adjustable about a vertical pivot, and shorter disk gangs carried on said frame at diagonally opposite corners and adjustable about vertical pivots.

posite directions, all of said gangs being adjustable angularly on vertical pivots through connections with said outer frame bars.

gangsalso connected to said frame. I I};

9. In a multi-disk harrow, a central frame. member, disks carriedby said memberfor. turning soil in one direction, and diSkSfiiil'g ried in'ofi'set relation on different sides of said'l-first mentioned disks for turning the"; soil in an opposite direction whereby the disks have an\interbalancing action for ai given depth of ground treatment.

.10. In a multi-disk barrow, a centrally arranged framemember, and three disk gangs having an overlapping relationshipand pive 'oted to said frameat points in the same. 5

straight line parallelto the line of draft twd;. 10fi of said disk gangs being ofiset. In testimony whereof I. afiix' my signs-i ture, in the presence of two witnesses.

' GEORGE W; WILLIS?- Witnesses:

LYDIA ROLL; HARRY WHITEFIELD.

opposite direction, all of said, disl s being associated,

a frame, a 60 of said central gang in a frame, a 6ft transversely beyond the.

gangs pivoted to said cen- 7t gang pivoted cons- .80v

8. In a double disk barrow, a frame, ,3

. central disk gang connected thereto, and M fore and aft offset disk 

